ATP and O2

Question 1

basic principle of ATP-ADP cycle

Answer 1

fuel oxidation generates ATP, and hydrolysis of ATP to ADP provides energy for work in the cell

Question 2

gibbs free energy in cells

Answer 2

amount of energy generated us determined by difference in energy levels of substrates and products - change in gibbs free energy
deltaG for energy production from fuel oxidation must be greater than deltaG for energy-requiring process

Question 3

bonds between phosphate groups in ATP

Answer 3

phosphoanhydride bonds
instability arises from their negatively charged phosphate groups - repel eachother and strain bonds
when bonds are hydrolysed, energy is released because products of the main reaction are more stable, w/ lower bond energies than reactants